Make disable_low_res_tiling independent of is_gpu_rasterization_enable

cc/layers/picture_layer_impl.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/picture_layer_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/time/time.h"
@@ skipping 464 matching lines @@
       gfx::ScaleSize(bounds(), max_contents_scale, max_contents_scale));
 }
 
 skia::RefPtr<SkPicture> PictureLayerImpl::GetPicture() {
   return pile_->GetFlattenedPicture();
 }
 
 void PictureLayerImpl::SetHasGpuRasterizationHint(bool has_hint) {
   bool old_should_use_gpu_rasterization = ShouldUseGpuRasterization();
   has_gpu_rasterization_hint_ = has_hint;
-  if (has_gpu_rasterization_hint_)
-    should_use_low_res_tiling_ = false;
   if (ShouldUseGpuRasterization() != old_should_use_gpu_rasterization)
     RemoveAllTilings();
 }
 
 bool PictureLayerImpl::ShouldUseGpuRasterization() const {
   switch (layer_tree_impl()->settings().rasterization_site) {
     case LayerTreeSettings::CpuRasterization:
       return false;
     case LayerTreeSettings::HybridRasterization:
       return has_gpu_rasterization_hint_;
@@ skipping 874 matching lines @@
   DCHECK(*this);
 
   IteratorType index = stages_[current_stage_].iterator_type;
   DCHECK(iterators_[index]);
   DCHECK(iterators_[index].get_type() == stages_[current_stage_].tile_type);
 
   return *iterators_[index];
 }
 
 }  // namespace cc